Oscillation-receiver.



filo' tion 'wliich 1' now, ".consider4 tp be they best, of the 'various forms .1n wlnch the principlesy ..fjffhis applicationisa division of my appli-I cation, S.,B.392,S9.t, `'tiled September 14th,"

1 UNITED sTATEs yiairnivr onirica..

. GBEENLnArh-,WHITTIER- rreizarm,v l or aMnsBUnY, MASSACHUSETTS;

- Specification of Letters Patent.

"' Patented' .tary 5, 191e;

Original applicationnledvsepteniber 14', 1907, Serial No.' '392,894..- Divided and this application filed March -Be it known thatl I, "GRENLAEVHrrrLEn ing' 4spleciticatioii and accompanying draw- 1ngs,wh1ch Adisclose the form .of the inven-y ofthe invention'niay be embodie l The `invention involves `higlrdegree of useful ,action inoscillation receivers of a ,particular electrical conductorvliich; Lhave discovered 'in the course of i 4 flfliis linvention' relates to' oscillation -re-r ce1vers,,foruseA l,1n yrecelvmg .intelligence communicated byelectro -magnetic Waves, and othegsnmlar uses.- ,l

the eiztraordinary my. investigations .in this, subject, whiclrcondu'ctor, when embodied in al1-oscillation re ceiver in accordance with .the disclosure hereof,-is effective to .approximately double ,the degree :of :any previous oscillation re-' ceiver sof Iwhich s1, am laware.

,y Of the` drawings, Figure lis a perspective' .view offa cleavagelfraginent offthe massive form of the conductor of the mvcntion;'

. Fig. 2-fis an elevatiornof an operative pair o'f conductors, one 'of "which, Z, is the conductor of Figyl; Fig. 3 is a' section 'of means for operatively mount-ing the1 conductor Z of Fig. Q;-F1g.-4'is'a sectional-ele vation `of a practical mechanical holder forthe conductors of Fig. 2, conductor Z being mounted as 1n Flg. 3; and Fig. 5 1s a sectional elevation of another form of holder for said conductors. y

- As shown 1n Fig. 1, a cleavage fragment of the particular' conductor, which 1s the mineral red oxid 0fzinc, (zincite'), is first obtained, as by breakage of a chunk of the massive conductor producing separation along a cleavage ace, (the dleavage in the mineral being spathic or foliated), and producingat least one fracture face transverse to the cleavage face. 4This substance is now known in this art as perikon, and this invention is therein .widely known as the Perikon detector. ln Fig. l the local cleavage face is indicated at X and the trac- `tu'refacesat F, F 4.

F i As .is shown in Figs. 2, "3 a'ndf4, the fracvtu're faces F are rough 'and' not polished', being left 1n exactly the;above-described condition resulting from 'breaka 'e`,' 'as sliown in Fig. l; because I- have foun that the sub- `stance Z dil'ers from 'many'pther conductors in that, apolished surface does not oler as"sensiti\'ea contact surface-as alrough fracture `face;-1he-substance Z, on-a'ccount of its` inherent-properties, however', eonstitutesa sensitive member of an'oscillat-ion receiver, yirrespective ofjany rough" character ofl its 1 contact'- surface, provided `that suit# able small-aread contactbe'obtaiiied, as by any suitable means.4 f f i The conductor Zactseiiciently vvithpiac`- tically anyother conductorsuch as A, (Fig. 2), which may' be brass forfeitax'nple, the rough fracture face F of .the member'Z being arranged in contactwith' a``fa'ce F1 of the-brass member.l x 4 f p As shown in- Fig. 3, the member Z -may n a practical lform be placedinaliqueti'ed mass of fusible metal M contained in a' metal cup C, the face F5 being exposed 'from the fusible metal', which isallowed to cool 4and harden *so that the conductor Zlbeeomes embedded iny good electrical, contacttherein.

I-n Fig. -l the mountingofFig. 3 for the Astandards ll, G secured to itby screws R, 'l`,

these standards being provided with binding postsI O, Q. for the leads to any suitable circuit conncctions depending on the4 mode of use of theldevice, which may be connected in any of the circuits known to those skilled in the electrical arts, such as any wireless tclograplrv or telephony or othercircuit for oscillatlng or alternating currents. l

The member A. is simply the end of a threaded brass rod L which is screwed into the standard E.

The cup C for the member Z is supported by a rod V to which itmay be non-rotatably secured in any suitable manner; the rod V having a rotating and sliding tit in the sleeve J, a which is rovided with a knurled rotating-head lv which turns the rod V and from .rod V'into Va longitudinal slotY5in the J may have annular fit' the rstandard'G. 'A'

helical sprir S-is ocatedbetween'fthe vrod V and head tact surface -of member Z againstmemberA Awithv a pressure'of about an ounce, although variations rom'this will do no harm unless thepressure be. made so excessive as to deof the goodcon tact which naturally exists, under such pressure, betweenthe contact surfaces F and F1 or' the respective members Zand A. A liber cylinder Kincloses the apparatus between Athe standards E, G.

In Fig. 5-is shown a conductor -Z 4may be manually.4 moved clirectly, being mechanically .held in circuit between the other conducting (which vmay be brass and to the oscillating rod` 1), and a conducting to' the standard G1,

rod V1 secured supporting the members D sulating base B1 and G1, which are secured to it by screws R1 1so that the member L1 can be swung to or.

for holding L1 4 .P1 is secure and T1. The part E1 `s pivoted in D at N,

from the rod V1, and the spring S1 (having one end secured to part E1) provides means against Z, to hold Z in position betwvee'n L1 and V1 tact with conducting member L1. As shown, the screw R1 is in elevation inside. part -D,

Which isshown in section, and beyond part ,E1 so that the latter may be freely swung. Anadjustment for to permit rariationrof contact pressure be the spring S1 s provide vtween Z and L1. This ad'ustinent is mounted on the standard P1, an consists of.a rod K1, to which the right-hand end'of the spring d and on which the -end of the unwoiind, by turns rino ma be Wound or which is secured to in the knurled head H1 -ro K1. The standard P1 is slotted at Y1 asl far as the` perforation in it for the rod K1,

means of the'pin P extending 'rotation by the sprin'g'tension, b 4'the screwl W1, but isnotsohel i [to which its ends may be sl.

' dered 4or. ,othcryvilsesuitably secured., The'v proportions may be such as to press thegconl and Q, and by turnin -spect to t hoidr in which file' `member L1' suitably secured energy, by converting a and in operating conand 'am ma ahem in the perforation from Va ainst a convenient -twist on the head H15 his is a suitable forms may bel devised.

means ofi vdesirable form Ofhclde'r,` butAman-y lother I i Y In operation. (Fig. 4), the desired .circuiti leads areeonnected to the bindin face F of member isl rotated by very slight degrees, simply .'to adjust it with re-4 1e coperating surface .F1 ber A until the best action results, asindi- 'cated by the usual telephone incircuitf The o eration in the case of Fig. 51is substanposts O rthehead ,the sur- -of merntially thesaine,'wvi'th respect-to the head H1 l and the binding posts Qand Q1." The char?l acter 'of the' surface F ofniember Z is such as to substantially always provide a contact of the maximum .sensitiveness inherent in this particularconductor Z.,

Vh'en used inseries Withltlie usual telef phone receiver, as Vis ii'ow 'customary .with oscillation detectorsin .wireless telegraphy and telephone, the inventiony constitutes the most eiicien't means known tome, of operating the telephone independently of'local large proportion of the encrgyof the oscillationsV uri'ent suitable for operating the telephone. Various' other conductors, ivhich may make operative contact ivithinember Z, may be used with said member, and the mechanicalcombination of various modes'of' use may be unlimited. v

Iclaim: 4 y An oscillation receiver, which comprises an electrical conductor in electrical contact with a substantially rough. unpolished frac- Hsolid, the mii'ieral red oxid of zinc, substantially as described.

entertain wuiriiiia Premian.

lVitnesses EDWARD H. Bowser., Mrm S. Rowena' into a direct 'ture Surface of the electrically conducting 

